The "Do What U Want" singer, 27, called her buff-bodied hottie a "hidden weirdo" during an appearance Friday on Ellen. "He is extremely strange, actually. We complement each other's weirdness. That's actually one of the first things he ever said to me. It's a Dr. Seuss quote. You find in someone else a compatible weirdness."

Gaga, who met the Chicago Fire star on the set of her "You and I" video in 2011, said she "looked ridiculously crazy" during their first encounter.

"I've got these pins sticking out of my head and I'm wearing cork and I've got no hair and I'm bald," she recalls of that fateful day. "I mean, why he found me attractive just completely behooves me. We were in the middle of this scene and I remember that he kissed me and it wasn't scripted for him to kiss me. I was sort of like, 'Uh, you know, was that real or was that fake?' And he just didn't really say anything, and that was fine by me and we just kept filming."

The pop star – who said in 2011 that she has "the inability to know what happiness feels like with a man" – covered her face in embarrassment when a particular photo popped up. Naturally, she couldn't look away for long.

"Oh, you had to show a shirtless picture," she said. "Geez. I mean I don't blame you, but – Hi, darling."

Gaga, who calls Kinney, 32, her "best friend," says, "Having your lover be your best friend is the best thing ever. We're boys. I wear his flannels and we eat pizza and watch TV. And then I play him my next single. He likes it, and that's our normal life."